Well, the DayZ fans will disagree about that. They'll tell you that Bohemia is doing a very bad job given all the millions they got from the DayZ sales and I kinda agree. Updates have become very sparse. Still zero game optimization a year later and still the standard "it's an alpha" explanation from Bohemia. So it's not like Bohemia has forsaken Arma for DayZ or at least it doesn't show despite that Dayz is pretty much the game that put Bohemia on the map and most of the money they had for the Arma 3's development came from the ton of people who bought Arma 2 purely for the DayZ mod.
Anyway, most of my friends used to play Altis and Wasteland but now it seems they mostly play Arma 2 Overpoch and Epoch. Personally I'm waiting for the Arma 3 Epoch to be completed.